var  timerID = null;
var  timerRunning = false;
startclock();
function  showtime(){
	Today  =  new  Date();
	var  NowHour  =  Today.getHours();
	var  NowMinute  =  Today.getMinutes();
	var  NowMonth  =  Today.getMonth();
	var  NowDate  =  Today.getDate();
	var  NowYear  =  Today.getYear();
	var  NowSecond  =  Today.getSeconds();
	if  (NowYear  <2000){
		NowYear=1900+NowYear;
	}
	Today  =  null;
	Hourleft  =  23  -  NowHour;
	Minuteleft  =  59  -  NowMinute;
	Secondleft  =  59  -  NowSecond;
	Yearleft  =  2009  -  NowYear;
	Monthleft  =  7 - NowMonth - 1;
	Dateleft  =  17  -  NowDate;
	if  (Secondleft<0)
	{
		Secondleft=60+Secondleft;
		Minuteleft=Minuteleft-1;
	}
	if  (Minuteleft<0)
	{
		Minuteleft=60+Minuteleft;
		Hourleft=Hourleft-1;
	}
	if  (Hourleft<0)
	{
		Hourleft=24+Hourleft;
		Dateleft=Dateleft-1;
	}
	if  (Dateleft<0)
	{
		Dateleft=31+Dateleft;
		Monthleft=Monthleft-1;
	}
	if  (Monthleft<0)
	{
		Monthleft=12+Monthleft;
		Yearleft=Yearleft-1;
	}
/*	Temp=Yearleft+'年,  '+Monthleft+'月,  '+Dateleft+'天,  '+Hourleft+'小时,  '+Minuteleft+'分,  '+Secondleft+'秒'*/
	Temp = '<font color=red>'+Dateleft+'</font>天<font color=red>'+Hourleft+'</font>小时<font color=red>'+Minuteleft+'</font>分<font color=red>'+Secondleft+'</font>秒';

	document.getElementById("banner").innerHTML=Temp;
	timerID  =  setTimeout("showtime()",1000);
	timerRunning  =  true;
}
function  stopclock(){
	if(timerRunning)
	clearTimeout(timerID);
	timerRunning  =  false;
}
function  startclock(){
	stopclock();
	showtime();
}